search

ForthHub / standard-evolution

Evolving of the Forth Standard, sketches, issues and discussions
0 stars 0 forks source link

Missed ambiguous condition #5

Open ruv opened 1 year ago

ruv commented 1 year ago

An ambiguous condition is missed for MARKER, which is declared for FORGET.

Something like: an ambiguous condition exists if definitions or data required for correct execution of the program are removed during execution of name.

See also a comment.

An ambiguous condition is missed for 17.6.1.0245 /STRING when n is negative and the resulting character string goes beyond the data space.

ruv commented 7 months ago

An ambiguous condition is missed for ALSO, when the search order is empty.

Probably, it's better to specify a throw code for this case (see the issue Eliminating of some ambiguous conditions).

[update] this issue was already discussed in comp.lang.forth in 2008. m_l_g3 wrote on 2008-12-16:

I change my mind and propose to declare it an ambiguous condition in all affected words (FORTH ALSO DEFINITIONS).

[update] see also: 16.4.1.2 Ambiguous conditions — only PREVIOUS is mentioned with "search order empty".